The HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR is an advanced standard zoom lens for Pentax APS-C DSLR cameras announced by Ricoh on November 6, 2013.

Being part of Pentax's Limited series, it features a metal barrel and a comparably small form factor.

Within the Limited series, it is the first zoom lens as well as the first lens to feature a silent built-in autofocus motor (DC) and weather resistance (WR).

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